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International Journal of Antennas and Propagation最新文献

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An Ultrathin Polarization Free Asterick-Shaped Metamaterial Absorber with Quad-Band Characteristics 具有四波段特性的超薄无极化星形超材料吸收体
IF 1.5 4区 计算机科学
International Journal of Antennas and Propagation Pub Date : 2023-09-05 DOI: 10.1155/2023/5664588
Raghvenda Kumar Singh, Ashish Gupta, Akash Yadav, N. Gupta, Utkarsh Tyagi
{"title":"An Ultrathin Polarization Free Asterick-Shaped Metamaterial Absorber with Quad-Band Characteristics","authors":"Raghvenda Kumar Singh, Ashish Gupta, Akash Yadav, N. Gupta, Utkarsh Tyagi","doi":"10.1155/2023/5664588","DOIUrl":"https://doi.org/10.1155/2023/5664588","url":null,"abstract":"In this paper, a quad-band absorber is proposed and developed, which is exhibiting ultrathin and polarization insensitive behaviour. It has been designed to be operated in S, C, and Ku bands with absorptions peaks at more than 95%. The proposed absorber is implemented on a FR4 glass epoxy laminate with an equivalent electrical thickness of 0.0108 λ0, where λ0 is the wavelength corresponding to the lowest frequency of operation. This confirms the ultrathin nature of the structure. The absorption performance of the proposed structure has been characterized under normal and oblique incidences followed by their experimental verification. Presented results demonstrate highly polarization-independent behavior of the proposed absorber due to its symmetric geometry. Also, the electromagnetic field distributions have been studied to acquire better insight of the absorption mechanism corresponding to distinct elements present in the structure. It is characterized in terms of its behavior as metamaterial, which ensures the miniaturization. The proposed absorber is suitable to be used in applications like radar cross section reduction, stealth technology, radio frequency identification, and electromagnetic compatibility.","PeriodicalId":54392,"journal":{"name":"International Journal of Antennas and Propagation","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44112473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Triband Compact Antenna for Wireless Applications 一种用于无线应用的三频紧凑型天线
IF 1.5 4区 计算机科学
International Journal of Antennas and Propagation Pub Date : 2023-09-02 DOI: 10.1155/2023/5344999
D. Allin Joe, Thiyagarajan Krishnan
{"title":"A Triband Compact Antenna for Wireless Applications","authors":"D. Allin Joe, Thiyagarajan Krishnan","doi":"10.1155/2023/5344999","DOIUrl":"https://doi.org/10.1155/2023/5344999","url":null,"abstract":"This paper presents the implementation of a triple band microstrip patch antenna based on modified split ring resonator (SRR) and modified complementary split ring resonator (CSRR) as defected ground plane. The antenna is designed in a FR4 substrate of dielectric constant 4.4 with dimensions as 35 mm × 35 mm × 1.6 mm that comprises a total designed antenna volume of 1960 mm3. Multiband operation is introduced in the antenna through multiple resonators that are introduced in the patch. Impedance matching was provided with the help of partial ground plane and modified SRR in patch. The simulation performance of the antenna is verified using high frequency structural simulator (HFSS) software. The designed antenna resonates at 2.8 GHz, 5.8 GHz, and 6.9 GHz for the application requirements of WiMAX, ISM, and Sub-7 GHz wireless communication. The antenna is fabricated as printed circuit board (PCB) format, and its return loss characteristics are measured using a vector network analyser (VNA). The measurement results of the proposed triband antenna are in good agreement with simulated return loss characteristics.","PeriodicalId":54392,"journal":{"name":"International Journal of Antennas and Propagation","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41969783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Advancing 5G Connectivity: A Comprehensive Review of MIMO Antennas for 5G Applications 推进5G连接:5G应用中MIMO天线的全面回顾
IF 1.5 4区 计算机科学
International Journal of Antennas and Propagation Pub Date : 2023-08-31 DOI: 10.1155/2023/5906721
Poonam Tiwari, V. Gahlaut, M. Kaushik, P. Rani, Anshuman Shastri, Bhupender Singh
{"title":"Advancing 5G Connectivity: A Comprehensive Review of MIMO Antennas for 5G Applications","authors":"Poonam Tiwari, V. Gahlaut, M. Kaushik, P. Rani, Anshuman Shastri, Bhupender Singh","doi":"10.1155/2023/5906721","DOIUrl":"https://doi.org/10.1155/2023/5906721","url":null,"abstract":"The review focuses on the emergence of 5G wireless communication and the need for multiple-input multiple-output antennas to support high-speed communication systems. The article discusses the advantages of MIMO antennas, including increased channel capacity and the ability to focus radio frequency energy on specific users. However, the challenges of creating compact MIMO antennas with ideal isolation are addressed, including short wavelengths, connection losses, constrained bandwidth, and path losses in the millimeter-wave range. Design techniques and methods to enhance the performance of conventional antennas for 5G applications are discussed, along with potential solutions for upcoming challenges. The article provides an overview of MIMO antennas for 5G applications, covering frequency bands, system architecture, advantages, challenges, advancements, performance enhancement techniques, design techniques, and state-of-the-art developments.","PeriodicalId":54392,"journal":{"name":"International Journal of Antennas and Propagation","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43332469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Retracted: HR Management Big Data Mining Based on Computational Intelligence and Deep Learning 撤下:基于计算智能和深度学习的人力资源管理大数据挖掘
IF 1.5 4区 计算机科学
International Journal of Antennas and Propagation Pub Date : 2023-08-16 DOI: 10.1155/2023/9840409
International Journal of Antennas and Propagation
{"title":"Retracted: HR Management Big Data Mining Based on Computational Intelligence and Deep Learning","authors":"International Journal of Antennas and Propagation","doi":"10.1155/2023/9840409","DOIUrl":"https://doi.org/10.1155/2023/9840409","url":null,"abstract":"<jats:p />","PeriodicalId":54392,"journal":{"name":"International Journal of Antennas and Propagation","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44726614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Retracted: The Effect Model of College PE Teaching Reform Based on Moral Education 退缩：基于德育的高校体育教学改革效果模型
IF 1.5 4区 计算机科学
International Journal of Antennas and Propagation Pub Date : 2023-08-16 DOI: 10.1155/2023/9810273
International Journal of Antennas and Propagation
{"title":"Retracted: The Effect Model of College PE Teaching Reform Based on Moral Education","authors":"International Journal of Antennas and Propagation","doi":"10.1155/2023/9810273","DOIUrl":"https://doi.org/10.1155/2023/9810273","url":null,"abstract":"<jats:p />","PeriodicalId":54392,"journal":{"name":"International Journal of Antennas and Propagation","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41364130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Retracted: Marketing Model of Tourism Enterprises Based on New Media Environment 退缩：新媒体环境下的旅游企业营销模式
IF 1.5 4区 计算机科学
International Journal of Antennas and Propagation Pub Date : 2023-08-16 DOI: 10.1155/2023/9874673
International Journal of Antennas and Propagation
{"title":"Retracted: Marketing Model of Tourism Enterprises Based on New Media Environment","authors":"International Journal of Antennas and Propagation","doi":"10.1155/2023/9874673","DOIUrl":"https://doi.org/10.1155/2023/9874673","url":null,"abstract":"<jats:p />","PeriodicalId":54392,"journal":{"name":"International Journal of Antennas and Propagation","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47883468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Retracted: Research on Interactive Art Online Teaching System Based on BS Mode and Internet of Things 收回：基于BS模式和物联网的交互式艺术在线教学系统研究
IF 1.5 4区 计算机科学
International Journal of Antennas and Propagation Pub Date : 2023-08-16 DOI: 10.1155/2023/9768912
International Journal of Antennas and Propagation
{"title":"Retracted: Research on Interactive Art Online Teaching System Based on BS Mode and Internet of Things","authors":"International Journal of Antennas and Propagation","doi":"10.1155/2023/9768912","DOIUrl":"https://doi.org/10.1155/2023/9768912","url":null,"abstract":"<jats:p />","PeriodicalId":54392,"journal":{"name":"International Journal of Antennas and Propagation","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43986430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Compact and Broadband-Balanced Amplifier for a Monolithic Microwave Integrated Circuit Using Lumped Elements Only 仅使用集总元件的单片微波集成电路的紧凑宽带平衡放大器
IF 1.5 4区 计算机科学
International Journal of Antennas and Propagation Pub Date : 2023-08-14 DOI: 10.1155/2023/5592459
Heeje Han, Hongjoon Kim
{"title":"Compact and Broadband-Balanced Amplifier for a Monolithic Microwave Integrated Circuit Using Lumped Elements Only","authors":"Heeje Han, Hongjoon Kim","doi":"10.1155/2023/5592459","DOIUrl":"https://doi.org/10.1155/2023/5592459","url":null,"abstract":"A flat phase difference across a broad bandwidth is achieved by appropriately combining the positive and negative phase propagation of right-handed (RH) and left-handed (LH) transmission lines (TLs), respectively. Employment of lumped elements provides easy realization of both TLs with the desired frequency passband, characteristic impedance, and phase propagation. The proposed quadrature power divider (QPD) was fabricated in a compact size by only using lumped elements instead of general TLs with a large area and a narrow bandwidth. The fabricated QPD maintains a flat phase difference of 90° ± 8.7° over a frequency range of 1.19–2.96 GHz while its circuit size is 0.036 \u0000 \u0000 \u0000 \u0000 λ\u0000 \u0000 \u0000 g\u0000 \u0000 \u0000 2\u0000 \u0000 \u0000 \u0000 . Owing to drastic size reduction of the QPD, the proposed balanced amplifier (BA) also could be realized with an extremely compact size of 0.044 \u0000 \u0000 \u0000 \u0000 λ\u0000 \u0000 \u0000 g\u0000 \u0000 \u0000 2\u0000 \u0000 \u0000 \u0000 and broad bandwidth unlike in other BAs reported in the literature and maintains a return loss of less than −10 dB at each port over the bandwidth of the QPD.","PeriodicalId":54392,"journal":{"name":"International Journal of Antennas and Propagation","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42291866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Retracted: China’s Green Bond Market: Structural Characteristics, Formation Factors, and Development Suggestions—Based on the Comparison of the Chinese and the US Green Bond Markets Structure 收回：中国绿色债券市场：结构特征、形成因素及发展建议——基于中美绿色债券市场结构比较
IF 1.5 4区 计算机科学
International Journal of Antennas and Propagation Pub Date : 2023-08-09 DOI: 10.1155/2023/9825021
International Journal of Antennas and Propagation
{"title":"Retracted: China’s Green Bond Market: Structural Characteristics, Formation Factors, and Development Suggestions—Based on the Comparison of the Chinese and the US Green Bond Markets Structure","authors":"International Journal of Antennas and Propagation","doi":"10.1155/2023/9825021","DOIUrl":"https://doi.org/10.1155/2023/9825021","url":null,"abstract":"<jats:p />","PeriodicalId":54392,"journal":{"name":"International Journal of Antennas and Propagation","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41357513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Retracted: Wavelet Transform-Based 3D Landscape Design and Optimization for Digital Cities 基于小波变换的数字城市三维景观设计与优化
IF 1.5 4区 计算机科学
International Journal of Antennas and Propagation Pub Date : 2023-08-09 DOI: 10.1155/2023/9781290
International Journal of Antennas and Propagation
{"title":"Retracted: Wavelet Transform-Based 3D Landscape Design and Optimization for Digital Cities","authors":"International Journal of Antennas and Propagation","doi":"10.1155/2023/9781290","DOIUrl":"https://doi.org/10.1155/2023/9781290","url":null,"abstract":"<jats:p />","PeriodicalId":54392,"journal":{"name":"International Journal of Antennas and Propagation","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42258575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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